Similarity and distinctions of  58, 60 Ni photodisintegration processes

V. V. Varlamov; Варламов В. В.; A. I. Davydov; Давыдов А. И.; V. N. Orlin; Орлин В. Н.

doi:10.31857/S0367676523702101

Similarity and distinctions of ^{58, 60}Ni photodisintegration processes

Authors: Varlamov V.V.¹, Davydov A.I.², Orlin V.N.¹
Affiliations:
1. Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics
2. Lomonosov Moscow State University, Physics Faculty
Issue: Vol 87, No 8 (2023)
Pages: 1166-1175
Section: Articles
URL: https://bakhtiniada.ru/0367-6765/article/view/135468
DOI: https://doi.org/10.31857/S0367676523702101
EDN: https://elibrary.ru/ZCRHPE
ID: 135468

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Abstract
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Abstract

Reliability of (γ, 1n) and (γ, 2n) reactions cross sections for ^{58, 60}Ni obtained in experiments carried out on the beams of bremsstrahlung and quasimonoenergetic annihilation photons was investigated using objective physical criteria. It was found that data of the first type experiment do not satisfy those criteria and definitely are not reliable. At the same time there are serious doubts in reliability of the data obtained in the second type experiment. New partial photoneutron reaction cross sections on ^{58, 60}Ni satisfying physical criteria of data reliability were used for analysis of characteristics of both isotope photodisintegration processes. It was obtained that for neighboring (differ in two neutrons) isotopes because of various type systematic uncertainties there are significant disagreements between evaluated and experimental cross sections of various reactions which for isotopes ⁵⁸Ni and ⁶⁰Ni are of significant different character. It was shown that the reasons are not only the differences in energy thresholds and absolute values of cross sections of the (γ, 1n), (γ, 1n1p) and (γ, 2n) reactions on ⁵⁸Ni and ⁶⁰Ni but significant differences in specific features of neighboring isotopes shell structure also.

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